Bug 1370482 - use longer timeout for browser_ext_sidebarAction.js, r=mikedeboer

MozReview-Commit-ID: Fp9rXZlwfI6

--HG--
extra : rebase_source : e70fc0ee2863abf09e3e8bfb4597912e66fd0ab0

browser/components/extensions/test/browser/browser_ext_sidebarAction.js

@@ -2,6 +2,8 @@
 /* vim: set sts=2 sw=2 et tw=80: */
 "use strict";
 
+requestLongerTimeout(2);
+
 let extData = {
   manifest: {
     "sidebar_action": {